package com.atguigu.flink.charkoer14;

import com.atguigu.flink.been.WaterSensor;
import org.apache.flink.api.common.eventtime.WatermarkStrategy;
import org.apache.flink.configuration.Configuration;
import org.apache.flink.streaming.api.datastream.DataStream;
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
import org.apache.flink.table.api.Table;
import org.apache.flink.table.api.Tumble;
import org.apache.flink.table.api.bridge.java.StreamTableEnvironment;

import java.time.Duration;

import static org.apache.flink.table.api.Expressions.$;
import static org.apache.flink.table.api.Expressions.lit;

public class FlinkWindowGroupBy {
    public static void main(String[] args) {
        Configuration conf = new Configuration();
        conf.setInteger("rest.port", 2000);
        StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment(conf);
        env.setParallelism(1);
        DataStream<WaterSensor> waterSensorStream =
                env
                        .fromElements(new WaterSensor("sensor_1", 1000L, 10),
                                new WaterSensor("sensor_1", 2002L, 20),
                                new WaterSensor("sensor_2", 3000L, 30),
                                new WaterSensor("sensor_1", 4003L, 40),
                                new WaterSensor("sensor_1", 5000L, 50),
                                new WaterSensor("sensor_2", 6000L, 60)
                        )
                        .assignTimestampsAndWatermarks(
                                WatermarkStrategy
                                        .<WaterSensor>forBoundedOutOfOrderness(Duration.ofSeconds(3))
                                        .withTimestampAssigner((ws, ts) -> ws.getTs())
                        );
        StreamTableEnvironment tEnv = StreamTableEnvironment.create(env);

        Table table = tEnv.fromDataStream(waterSensorStream, $("id"), $("ts").rowtime(), $("vc"));

        table
                .window(Tumble.over(lit(2).second()).on($("ts")).as("w"))
                .groupBy($("id"), $("w"))
                .select($("id"), $("w").start().as("stt"), $("w").end().as("edt"), $("vc").sum().as("sum_vc"))
                .execute().print();
    }
}
